Quote:

Originally Posted by swajames The 550 is a great car, but it's pretty clear that the 4S is quicker than the 550

Not clear at all if you are talking about 550xi. Official numbers are:
550xi: 4.8s (0-100kmh)
4S: 4.8s (0-60 mph), 4.6 sec. with Sport Chrono Package Plus.

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2011 550i xDrive, M Sport, Carbon Black, Black Leather/Anthracite, SAT, PP2, HUD, CWP, Active Vent. Seats, 4-zone climate, Fold down rear-seats, Side and top view camera (11/2010 build).
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2012 X5 xDrive50i (wife)
2008 X5 4.8 (retired)
2008 550i M Sport (retired)
2005 545i (retired)